Hello doctor, Previously, I had a blood test for hepatitis B but was not infected and received hepatitis B vaccine. First time: November 2012; 2nd time: 12/2012, 3rd time: May 2013. Then in May 2017, I went back to check and gave the following results: Anti HBs - Positive 12.8 (<10) IU/L - SHLS/QTXN/27 (MD); Total Anti HBc - Positive 9.03 (<1.0 S/CO) - SHLS/QTXN/28 (MD). When the doctor sees the results and says no more vaccinations are needed. The doctor asked me if I tested positive for Anti-HBs, should I get the hepatitis B vaccine again? Thank you doctor.